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7.4
9.2.2
9.0
8.0.2
8.0
7.4.2
7.4.1
7.4
7.3.1
InfoScale
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Section I. Configuring Cluster Server using the script-based installer
I/O fencing requirements
I/O fencing requirements
Coordinator disk requirements for I/O fencing
CP server requirements
Non-SCSI-3 I/O fencing requirements
Preparing to configure VCS clusters for data integrity
About planning to configure I/O fencing
Typical VCS cluster configuration with disk-based I/O fencing
Recommended CP server configurations
Setting up the CP server
Planning your CP server setup
Installing the CP server using the installer
Setting up shared storage for the CP server database
Configuring the CP server using the installer program
Configuring the CP server manually
Configuring the CP server manually for HTTPS-based communication
Generating the key and certificates manually for the CP server
Completing the CP server configuration
Configuring CP server using response files
Response file variables to configure CP server
Sample response file for configuring the CP server on single node VCS cluster
Sample response file for configuring the CP server on SFHA cluster
Verifying the CP server configuration
Configuring VCS
Overview of tasks to configure VCS using the product installer
Starting the software configuration
Specifying systems for configuration
Configuring the cluster name
Configuring private heartbeat links
Configuring the virtual IP of the cluster
Configuring VCS in secure mode
Setting up trust relationships for your VCS cluster
Configuring a secure cluster node by node
Configuring the first node
Configuring the remaining nodes
Completing the secure cluster configuration
Adding VCS users
Configuring SMTP email notification
Configuring SNMP trap notification
Configuring global clusters
Completing the VCS configuration
About Veritas License Audit Tool
Verifying and updating licenses on the system
Checking licensing information on the system
Replacing a VCS keyless license with another keyless license
Replacing a VCS keyless license with a permanent license
Configuring VCS clusters for data integrity
Setting up disk-based I/O fencing using installer
Initializing disks as VxVM disks
Configuring disk-based I/O fencing using installer
Refreshing keys or registrations on the existing coordination points for disk-based fencing using the installer
Checking shared disks for I/O fencing
Verifying Array Support Library (ASL)
Verifying that the nodes have access to the same disk
Testing the disks using vxfentsthdw utility
Setting up server-based I/O fencing using installer
Refreshing keys or registrations on the existing coordination points for server-based fencing using the installer
Setting the order of existing coordination points for server-based fencing using the installer
About deciding the order of existing coordination points
Setting the order of existing coordination points using the installer
Setting up non-SCSI-3 I/O fencing in virtual environments using installer
Setting up majority-based I/O fencing using installer
Enabling or disabling the preferred fencing policy
Section II. Automated configuration using response files
Performing an automated VCS configuration
Configuring VCS using response files
Response file variables to configure VCS
Sample response file for configuring Cluster Server
Performing an automated I/O fencing configuration using response files
Configuring I/O fencing using response files
Response file variables to configure disk-based I/O fencing
Sample response file for configuring disk-based I/O fencing
Response file variables to configure server-based I/O fencing
Sample response file for configuring server-based I/O fencing
Response file variables to configure non-SCSI-3 I/O fencing
Sample response file for configuring non-SCSI-3 I/O fencing
Response file variables to configure majority-based I/O fencing
Sample response file for configuring majority-based I/O fencing
Section III. Manual configuration
Manually configuring VCS
About configuring VCS manually
Configuring LLT manually
Setting up /etc/llthosts for a manual installation
Setting up /etc/llttab for a manual installation
About LLT directives in /etc/llttab file
Additional considerations for LLT for a manual installation
Configuring GAB manually
Configuring VCS manually
Configuring the cluster UUID when creating a cluster manually
Configuring VCS in single node mode
Disabling LLT, GAB, and I/O fencing on a single node cluster
Disabling LLT, GAB, and I/O fencing
Enabling LLT, GAB, and I/O fencing
Starting LLT, GAB, and VCS after manual configuration
About configuring cluster using VCS Cluster Configuration wizard
Before configuring a VCS cluster using the VCS Cluster Configuration wizard
Launching the VCS Cluster Configuration wizard
Configuring a cluster by using the VCS cluster configuration wizard
Adding a system to a VCS cluster
Modifying the VCS configuration
Configuring the ClusterService group
Manually configuring the clusters for data integrity
Setting up disk-based I/O fencing manually
Identifying disks to use as coordinator disks
Setting up coordinator disk groups
Creating I/O fencing configuration files
Cluster Server 7.4 Configuration and Upgrade Guide - AIX - v7.4
Verifying I/O fencing configuration
Setting up server-based I/O fencing manually
Preparing the CP servers manually for use by the VCS cluster
Generating the client key and certificates manually on the client nodes
Configuring server-based fencing on the VCS cluster manually
Sample vxfenmode file output for server-based fencing
Configuring CoordPoint agent to monitor coordination points
Verifying server-based I/O fencing configuration
Setting up non-SCSI-3 fencing in virtual environments manually
Sample /etc/vxfenmode file for non-SCSI-3 fencing
Setting up majority-based I/O fencing manually
Creating I/O fencing configuration files
Modifying VCS configuration to use I/O fencing
Verifying I/O fencing configuration
Sample /etc/vxfenmode file for majority-based fencing
Section IV. Upgrading VCS
Planning to upgrade VCS
About upgrading to VCS 7.4
Upgrading VCS in secure enterprise environments
Supported upgrade paths
Considerations for upgrading secure VCS 6.x clusters to VCS 7.4
Considerations for upgrading VCS to 7.4 on systems configured with an Oracle resource
Considerations for upgrading secure VCS clusters to VCS 7.4
Considerations for upgrading CP servers
Considerations for upgrading CP clients
Using Install Bundles to simultaneously install or upgrade full releases (base, maintenance, rolling patch), and individual patches
Performing a VCS upgrade using the installer
Before upgrading VCS using the script-based installer
Upgrading VCS using the product installer
Upgrading to 2048 bit key and SHA256 signature certificates
Tasks to perform after upgrading to 2048 bit key and SHA256 signature certificates
Deleting certificates of non-root users after upgrading to 2048 bit key and SHA256 signature certificates
Re-establishing WAC communication in global clusters after upgrading to 2048 bit key and SHA256 signature certificates
Re-establishing CP server and CP client communication after upgrading to 2048 bit key and SHA256 signature certificates
Re-establishing trust with Steward after upgrading to 2048 bit key and SHA256 signature certificates
Upgrading Steward to 2048 bit key and SHA256 signature certificates
Performing an online upgrade
Limitations of online upgrade
Upgrading VCS online using the installer
Performing a rolling upgrade of VCS
About rolling upgrade
Performing a rolling upgrade using the product installer
Performing a phased upgrade of VCS
About phased upgrade
Prerequisites for a phased upgrade
Planning for a phased upgrade
Phased upgrade limitations
Phased upgrade example
Phased upgrade example overview
Performing a phased upgrade using the product installer
Moving the service groups to the second subcluster
Upgrading the operating system on the first subcluster
Upgrading the first subcluster
Preparing the second subcluster
Activating the first subcluster
Upgrading the operating system on the second subcluster
Upgrading the second subcluster
Finishing the phased upgrade
Performing an automated VCS upgrade using response files
Upgrading VCS using response files
Response file variables to upgrade VCS
Sample response file for full upgrade of VCS
Sample response file for rolling upgrade of VCS
Section V. Adding and removing cluster nodes
Adding a node to a single-node cluster
Adding a node to a single-node cluster
Setting up a node to join the single-node cluster
Installing VxVM or VxFS if necessary
Installing and configuring Ethernet cards for private network
Configuring the shared storage
Bringing up the existing node
Creating configuration files
Starting LLT and GAB
Reconfiguring VCS on the existing node
Verifying configuration on both nodes
Adding a node to a multi-node VCS cluster
Adding nodes using the VCS installer
Manually adding a node to a cluster
Setting up the hardware
Installing the VCS software manually when adding a node
Setting up the node to run in secure mode
Configuring the authentication broker on node sys5
Configuring LLT and GAB when adding a node to the cluster
Configuring I/O fencing on the new node
Preparing to configure I/O fencing on the new node
Configuring server-based fencing on the new node
Adding the new node to the vxfen service group
Starting I/O fencing on the new node
Adding the node to the existing cluster
Starting VCS and verifying the cluster
Adding a node using response files
Response file variables to add a node to a VCS cluster
Sample response file for adding a node to a VCS cluster
Removing a node from a VCS cluster
Removing a node from a VCS cluster
Verifying the status of nodes and service groups
Deleting the departing node from VCS configuration
Modifying configuration files on each remaining node
Removing the node configuration from the CP server
Removing security credentials from the leaving node
Unloading LLT and GAB and removing Veritas InfoScale Availability or Enterprise on the departing node
Section VI. Installation reference
Services and ports
About InfoScale Enterprise services and ports
Configuration files
About the LLT and GAB configuration files
About the AMF configuration files
About the VCS configuration files
Sample main.cf file for VCS clusters
Sample main.cf file for global clusters
About I/O fencing configuration files
Sample configuration files for CP server
Sample main.cf file for CP server hosted on a single node that runs VCS
Sample main.cf file for CP server hosted on a two-node SFHA cluster
Sample CP server configuration (/etc/vxcps.conf) file output
Tuning LLT variables for FSS environments
Tuning LLT variables for Ethernet links
Configuring LLT over UDP
Using the UDP layer for LLT
When to use LLT over UDP
Manually configuring LLT over UDP using IPv4
Broadcast address in the /etc/llttab file
The link command in the /etc/llttab file
The set-addr command in the /etc/llttab file
Selecting UDP ports
Configuring the netmask for LLT
Configuring the broadcast address for LLT
Sample configuration- direct-attached links
Sample configuration- links crossing IP routers
Manually configuring LLT over UDP using IPv6
The link command in the /etc/llttab file
The set-addr command in the /etc/llttab file
Selecting UDP ports
Sample configuration- direct-attached links
Sample configuration- links crossing IP routers
LLT over UDP sample /etc/llttab
Configuring the secure shell or the remote shell for communications
About configuring secure shell or remote shell communication modes before installing products
Manually configuring passwordless ssh
Setting up ssh and rsh connection using the installer -comsetup command
Setting up ssh and rsh connection using the pwdutil.pl utility
Restarting the ssh session
Enabling rsh for AIX
Installation script options
Installation script options
Troubleshooting VCS configuration
Restarting the installer after a failed network connection
Cannot launch the cluster view link
Starting and stopping processes for the Veritas InfoScale products
Installer cannot create UUID for the cluster
LLT startup script displays errors
The vxfentsthdw utility fails for Active/Passive arrays when you test disks in raw format
The vxfentsthdw utility fails when SCSI TEST UNIT READY command fails
Issues during fencing startup on VCS cluster nodes set up for server-based fencing
Sample VCS cluster setup diagrams for CP server-based I/O fencing
Configuration diagrams for setting up server-based I/O fencing
Two unique client clusters served by 3 CP servers
Client cluster served by highly available CPS and 2 SCSI-3 disks
Two node campus cluster served by remote CP server and 2 SCSI-3 disks
Multiple client clusters served by highly available CP server and 2 SCSI-3 disks
Changing NFS server major numbers for VxVM volumes
Changing NFS server major numbers for VxVM volumes
Upgrading the Steward process
Upgrading the Steward process
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Cluster Server 7.4 Configuration and Upgrade Guide - AIX - v7.4
Section VI. Installation reference
Configuring LLT over UDP
Configuring LLT over UDP
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Last published :
Jun 11, 2026
This section includes the following topics:
Using the UDP layer for LLT
Manually configuring LLT over UDP using IPv4
Manually configuring LLT over UDP using IPv6
LLT over UDP sample /etc/llttab
Related information
Section VI. Installation reference
Using the UDP layer for LLT
Manually configuring LLT over UDP using IPv4
Manually configuring LLT over UDP using IPv6
LLT over UDP sample /etc/llttab
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